Leadership

Physics

Nine Standard

Test your understanding of this lesson Numerical problems from work, power & energy:-

1)
On application of 1 N force, if 1 metre displacement take place then the work done will be
  • 1 erg
  • \(10^{5}\) erg
  • \(10^{7}\) erg
  • \(10^{10}\) erg
2)
A body of mass 10 kg moving with velocity 10m/s accrue kinetic energy
  • 50 joule
  • 100 joule
  • 500 joule
  • 1000 joule
3)
When a body of mass 10 kg is lifted at height 10 m against gravity (value of g=9.8m/\(s^{2}\)) potential energy posses by the body is
  • 9.8 joule
  • 98 joule
  • 980 joule
  • 9800 joule
4)
If the power of a machine be 60 watt, the work that can be perform by the machine in one minute is
  • 1 joule
  • 60 joule
  • 360 joule
  • 360 joule
5)
If a moving body of mass 5 kg accrues a kinetic energy 40 joule. Then it's velocity is
  • 1 m/s
  • 2 m/s
  • 3 m/s
  • 4 m/s
Hand draw

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